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Faxon AR15 / M16 BCG - Black Nitride

We just can't help not accepting the status quo. Bolt carrier groups are available aplenty, but few could meet our exacting standards for performance and value. Seeing "MIL-SPEC" as just the starting point, we set out to ensure the best options are available for our demanding customers.

Improvements include using 9310 tool steel for the bolt, which is stronger and nitriding the assembly to increase surface hardness, decrease resistance, and have superior corrosion resistance compared to typical chrome and phosphasted bolt carrier groups. All bolts are fully MPI tested to ensure the material is sound and without defects. Bolt lugs are chamfered 45 degrees to ensure reliable action for even the highest pressure hand loads and fast lightweight actions.

Faxon Bolt Carrier Groups are Superfinished to reduce friction, increase smoothness of operation, and reduce fouling. Further, they are full-Auto rated and maintain the trip for full-auto fire control groups and new multi-stage trigger systems. Gas keys use grade 8 fasteners and are fully staked for a lifetime of service.

Detailed Specifications Below:

DETAILED SPECIFICATIONS:

Bolt:

9310 Tool Steel Construction (Stronger than C158)

Full MIL-SPEC Heat Treatment

Shot Peened to MIL-SPEC

Magnetic Particle Inspection (MPI)

Back of Lugs Chamfered for Reliability

Spring, Insert, & "Crane" O-Ring Installed

QPQ - Salt Bath Nitrided

Extractor:

S7 Tool Steel Construction

Fully Heat Treated

Shot Peened Per MIL-SPEC

QPQ - Salt Bath Nitrided

Carrier & Key:

Superfinished Carrier

Carrier: MIL-SPEC 8620 Steel Material

Key: 4140 Steel Material

Fully Heat Treated

Forward Assist Serrations

M16 (FULL-AUTO) Compatible

Grade 8 Fasteners

Fully & Properly Staked Key, Permatex Sealed

QPQ - Salt Bath Nitrided

Cam Pin:

4140 Pre-Hardended Steel Material

QPQ - Salt Bath Nitride

Note - Bolt carriers ordered and deployed with barrels not specifically checked by Faxon for headspacing MUST be checked to ensure safe and reliable function. Faxon recommends Pacific Tool & Gauge headspace kits for all measurements. For detailed instructions on headspacing, see our blog post for instructions.